The aim of this PhD thesis is to cast a new light on Eisenstein's work and thought, by focusing on his privileged relationship with Daumier's art. As we will come across Eisenstein's graphic, theatrical, cinematographical and theoretical work, we will unveil Daumier's still unknown reception in Russia and in U.S.S.R. By the same token, we will expose and discuss Eisenstein's challenging and modern vision of Daumier. The methodology chosen here is necessarily transciplinar.